Armytrix's website: - The company Armytrix has come up with a very loud full dekat exhaust available for the BMW M4 F82. In this video you can see the M4 being driven flatout and also the remote control of the exhaust via Armytrix's official iPhone app! Armytrix Corp. has established itself as a manufacturer of world class titanium and stainless valvetronic exhaust system for high-end performance cars. ARMYTRIX R&D team consists of German and Japanese factory engineers and supercar tuning experts, each of them has more than decades of knowledge and experiences in race track and automotive performance industry. Inquiry: info@armytrix.com Facebook: Youtube: In case you're wondering, I'm collaborating with Armytrix and some of their videos will be featured on my channel.